No 75 was based at Newmarket ,part of No 3 Group as marked above. Sometime in May- June 1943 it moved to its new base at Mepal and was susequently re-equipped with Lancasters in 1944( June or so?).Officially opened in June 1943, its first occupants were the Stirlings of No. 75 Squadron, removed from the turf of Newmarket Heath, which conducted its first operation from Mepal on the night of July 3. Named the New Zealand Squadron and manned largely by citizens of that country, No. 75 was to remain in residence for a little over two years, seeing out the war from Mepal. No other squadron was based there during this period as No. 75 maintained three flights, their complements often totalling more than 30 aircraft, particularly after Lancasters replaced the Stirlings in March 1944. The squadron lost 104 bombers in operations from Mepal, 50 being Stirlings and 52 Lancasters.